Tissue paper

ABSTRACT

To provide tissue paper with an excellent “moist texture” and high “smooth texture.” 
     2-ply tissue paper is characterized by the basis weight per ply being 15 to 18 g/m 2 , the 2-ply paper thickness being 135 to 160 μm, and containing 2.9 g/m 2  or more and 8.0 g/m 2  or less of chemical agent which contains glycerin and 1,3-propanediol in a total amount of 83.7 mass % or more, wherein the mass ratio of glycerin and 1,3-propanediol is 1:0.04 or more and 1:5.58 or less.

TECHNICAL FIELD

The present invention relates to tissue paper, particularly tissue papercontaining a moisturizer.

BACKGROUND ART

Tissue paper can be roughly classified into lotion tissue paper in whicha moisturizer is contained in tissue base paper after papermaking,moisturizing tissue paper called e.g. chemicals applied type, ageneral-purpose type which does not contain a moisturizer, andnon-moisturizing tissue paper called e.g. a general type.

Moisturizing tissue paper is used mainly to directly touch the skin, forexample blowing nose and removing makeup, and is particularly requiredto have a good texture to the skin during use.

Incidentally, the quality characteristics of tissue paper include mainly“soft texture,” “smooth texture,” a “moist texture,” a “sticky texture,”a “thick texture” and “toughness (strength•a relief feeling).”

The moisturizing tissue paper is more excellent in “soft texture,”“smooth texture” and a “moist texture” due to the effect of amoisturizer than those of the non-moisturizing tissue paper; however,there are no conventional moisturizing tissue paper in whichparticularly both “smooth texture” and a “moist texture” are satisfiedat a high level. In addition, users require further improvement of goodtexture to the skin; however, it is very difficult to improve both“smooth texture” and a “moist texture.”

That is, in conventional moisturizing tissue paper, “soft texture” and a“moist texture,” are improved by raising water retention properties inpaper because of the moisture absorption action of the moisturizer. Withthis change, “smooth texture” can be felt, too. However, in the case ofconventional moisturizers, for example, when increasing the contentthereof, a “moist texture” is increased, and simultaneously a “stickytexture” is also increased. Following this, the “smooth texture” on thesurface is reduced and is not easily felt. In addition, containingexcessive moisturizer can be a factor of lowering resilience of paper,and this can be a factor of not feeling “smooth texture” easily.

CITATION LIST Patent Literature Patent Literature 1: JP 2013-511509 APatent Literature 2: JP 2013-511626 A Patent Literature 3: JP 2-74694 ASUMMARY OF THE INVENTION Technical Problem

Therefore, a main subject of the present invention is to providemoisturizing tissue paper, in which particularly both a “moist texture”and “smooth texture” are improved, a “moist texture” which conventionalmoisturizing tissue paper do not have is retained, and simultaneously“smooth texture” can be sufficiently felt.

Solution to Problem

The means for solving the above problem and their operational advantageare as described below.

[Invention Described in claim 1]

2-ply tissue paper, wherein

a basis weight per ply is 15 to 18 g/m²,

the 2-ply paper thickness is 135 to 160 μm, and the 2-ply tissue papercontaining

2.9 g/m² or more and 8.0 g/m² or less of chemical agent which containsglycerin and 1,3-propanediol in a total amount of 83.7 mass % or more,wherein the mass ratio of glycerin and 1,3-propanediol is above 1:0.04and 1:5.58 or less.

[Invention Described in claim 2]

The 2-ply tissue paper, wherein

a basis weight per ply is 16.2 g/m² or more and 17.4 g/m² or less,

the 2-ply paper thickness is 136 μm or more and 156 μm or less, and the2-ply tissue paper containing

2.9 g/m² or more and 8.0 g/m² or less of chemical agent which containsglycerin and 1,3-propanediol in a total amount of 83.7 mass % or more,wherein the mass ratio of glycerin and 1,3-propanediol is above 1:0.04and 1:5.58 or less.

[Invention Described in claim 3]

The 2-ply tissue paper according to claim 1 or 2, wherein

the 2-ply dry tensile strength in the CD direction is 51 cN/25 mm ormore and 62 cN/25 mm or less,

the 2-ply wet tensile strength in the CD direction is 39 cN/25 mm ormore and 58 cN/25 mm or less, and

the ratio of the 2-ply wet tensile strength in the CD direction to the2-ply dry tensile strength in the CD direction is 0.68 or more.

Advantageous Effects of Invention

The present inventors investigated the selection of various chemicalagents, the blending ratio and the physical properties of paper for thepurpose of obtaining both a “moist texture” and “smooth texture” inmoisturizing tissue paper, thereby completing the tissue paper accordingto the present invention.

According to the present invention, when in 2-ply tissue paper, thebasis weight per ply is 15 to 18 g/m², the basis weight per ply ispreferably above 16.2 g/m² and less than 17.4 g/m², the 2-ply paperthickness is 135 to 160 μm, the 2-ply paper thickness is preferably 136μm or more and 156 μm or less, and 2.9 g/m² or more and 8.0 g/m² or lessof chemical agent, which contains particularly glycerin and1,3-propanediol in a total amount of 83.7 mass % or more, wherein themass ratio of glycerin and 1,3-propanediol (the mass ratio of1,3-propanediol to 1 glycerin) is above 1:0.04 and 1:5.58 or less, iscontained, both a “moist texture” and “smooth texture” are obtained at avery high level compared to those of conventional moisturizing tissuepaper. Furthermore, a “sticky texture” is limited and “soft texture” isalso high. As described above, according to the present invention, thequality characteristics of tissue paper, “soft texture,” “smoothtexture,” a “moist texture” and a “sticky texture” are excellent. Theabove effects will be described particularly in examples describedbelow.

In this case, it is desirable that the 2-ply dry tensile strength in theCD direction be 51 cN/25 mm or more and 62 cN/25 mm or less, the 2-plywet tensile strength in the CD direction be 39 cN/25 mm or more and 58cN/25 mm or less, and the ratio of the 2-ply wet tensile strength in theCD direction to the 2-ply dry tensile strength in the CD direction be0.68 or more. By adjusting the dry tensile strength to such range,strength which can withstand use is secured, and simultaneously adecrease in wet strength by containing chemical agent is suppressed, andstrength can be secured for example even when in use with wet hands.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a graph showing the results of test examples according to anembodiment.

FIG. 2 is a graph showing the results of test examples according to anembodiment.

DESCRIPTION OF EMBODIMENTS

Embodiments of the present invention will now be described. The tissuepaper according to the embodiment is 2-ply tissue paper which has arelatively high basis weight, wherein the basis weight per ply is 15 to18 g/m², the basis weight per ply is preferably 16.82 g/m² or more and17.4 g/m² or less, and further preferably 11.0 g/m² or more and 12.5g/m² or less, the 2-ply paper thickness is 135 to 160 μm, the 2-plypaper thickness is preferably 136 μm or more and 156 μm or less.

This tissue paper has a relatively high basis weight and has a thicktexture in the paper thickness. The tissue paper has such basis weightand paper thickness, and thus in relation to this, particularly a “moisttexture” and “smooth texture” are felt in combination with a peculiarmoisturizer and the amount of moisturizer applied. It should be notedthat the basis weight is a value measured based on JIS P 8124 (1998). Inaddition, as a method for measuring paper thickness, a test piece issufficiently conditioned under the condition of JIS P 8111 (1998) andthe paper thickness in a 2-ply state is then measured under the samecondition using a dial thickness gauge (thickness meter) “PEACOCK G”(manufactured by OZAKI MFG. CO., LTD.) More particularly, afterconfirming that there are not dust etc. between the plunger and themeasurement stand, the plunger is put down on the measurement stand andthe scale of the dial thickness gauge is shifted for zero pointadjustment. Subsequently, the plunger is put up and a sample is put onthe test stand. The plunger is slowly put down and a gauge is read. Atthis time, the plunger is just put on. The terminal of the plunger ismade of metal and a round flat surface with a diameter of 10 mm isvertically put on the flat surface of paper, and a load is about 70 gfat the time of measuring paper thickness. It should be noted that thepaper thickness is an average value obtained by repeating measurementten times.

In the meantime, the tissue paper according to the embodiment contains2.9 g/m² or more and 8.0 g/m² or less of chemical agent which containsglycerin and 1,3-propanediol in a total amount of 83.7 mass % or more,wherein the mass ratio of glycerin and 1,3-propanediol (the mass ratioof 1,3-propanediol to 1 glycerin) is above 1:0.04 and 1:5.58 or less.When the total amount of glycerin and 1,3-propanediol is less than 83.7mass %, both a “moist texture” and “smooth texture” are not sufficientlyimproved. Besides, when the mass ratio of glycerin and 1,3-propanediolis outside a range of above 1:0.04 and 1:5.58 or less, both or eitherone of a “moist texture” and “smooth texture” is not easily felt. Whenthe content of moisturizer is 2.9 g/m² or less, both a “moist texture”and “smooth texture” are not felt, and when the content is 9.2 g/m² ormore, costs increase and furthermore “smooth texture” and also a “moisttexture” are not easily felt.

On the other hand, fiber materials constituting the tissue paperaccording to the embodiment are pulp fibers and are desirably NBKP andLBKP which are used for tissue paper. Used paper pulp can be blended,but it is preferred that the tissue paper be constituted from only NBKPand LBKP, virgin pulp. The blending proportion is desirablyNBKP:LBKP=25:75 to 40:60 by mass ratio. In this range, the paperstrength and “soft texture” are easily expressed.

In the tissue paper according to the embodiment, it is desired that the2-ply dry tensile strength in the CD direction be 51 cN/25 mm or moreand 62 cN/25 mm or less, the 2-ply wet tensile strength in the CDdirection be 39 cN/25 mm or more and 58 cN/25 mm or less, and the ratioof the 2-ply wet tensile strength in the CD direction to the 2-ply drytensile strength in the CD direction be 0.68 or more. The dry tensilestrength is prescribed in JIS P 8113 and the wet tensile strength isprescribed in JIS P 8135 (1998). This tissue paper has each strengthdescribed above, and thus the strength enough to withstand use can beshown, and “toughness (strength•a relief feeling)” is also provided forusers. In the tissue paper according to the embodiment, the ratio of the2-ply wet tensile strength in the CD direction to the 2-ply dry tensilestrength in the CD direction is 0.68 or more, and a difference instrength between a dry state and a wet state is relatively smallcompared to that of a general moisturizing tissue. This can be easilyachieved by providing the basis weight and the like and thecharacteristic moisturizer composition of the tissue paper according tothe embodiment, and by such difference in strength, users feel“toughness (strength•a relief feeling) in the changing mode of use froma dry state to a wet state, for example particularly when blowing nose.Furthermore, a change in paper strength in such mode of use is noteasily felt, and an uncomfortable feeling that “smooth texture” ischanged during use is also not felt.

In order to provide the moisturizer composition of the tissue paperaccording to the embodiment, when adjusting the dry tensile strength andwet tensile strength to the above values, a dry paper strengtheningagent and a wet paper strengthening agent can be internally added topaper materials or a wet paper web. As dry paper strengthening agents,starch, polyacrylamide, CMC (carboxymethylcellulose) or salts thereof,sodium carboxymethylcellulose, calcium carboxymethylcellulose and zinccarboxymethylcellulose and the like can be used. As wet paperstrengthening agents, polyamide polyamine-epichlorohydrin resin, urearesin, acid colloid melamine resin, thermal crosslinking-coated PAM andthe like can be used. It should be noted, when internally adding a drypaper strengthening agent, the amount added to pulp slurry is about 0.5to 1.0 kg/t by weight ratio. In addition, it is desired that a wet paperstrengthening agent be a cationic one, and the amount added to pulpslurry is about 5.0 to 20.0 kg/pulp t by weight ratio.

Herein, the tissue paper according to the embodiment can be produced bythe same method as for a conventional moisturizing tissue. That is,single layer tissue base paper with crepe after papermaking inpapermaking equipment is wound to form a primary paper roll, and two ofthis primary paper roll are set to laminating equipment also called aply machine. A continuous single layer sheet is drawn out from eachprimary paper roll and laminated, and for example the laminated sheet isthen suitably slit to wind a secondary paper roll. Using this secondarypaper roll, a laminated bundle is formed in e.g. folding equipment alsocalled inter folder, and for example cut into suitable sizes tomanufacture tissue paper products. The step for applying chemicals isseparately provided in any step or between steps in a series ofproduction steps for manufacturing a product to apply a moisturizingchemicals containing a moisturizer to tissue paper, and the tissue paperaccording to the embodiment can be produced thereby.

The moisturizing chemicals according to the embodiment can be adjustedso that glycerin and 1,3-propanediol will be contained in a total amountof 83.7 mass % or more in active ingredients and the mass ratio ofglycerin and 1,3-propanediol will be above 1:0.04 and 1:5.58 or less.More particularly, the above active ingredients are a basis, andmoisturizing chemicals are adjusted to a viscosity according to anapplication method suitably using a solvent such as water. Other knownauxiliary agents can be added to moisturizing chemicals withoutinhibiting the effects of glycerin and 1,3-propanediol. Naturally, theseauxiliary agents in moisturizing chemicals are contained in tissue paperafter applied and can constitute chemical agent. Examples of auxiliaryagents include auxiliary moisturizing components such as sorbitol,hydrophilic polymer gelling agents to increase moisture retentionproperties in tissue paper such as glucomannan, softness improvers suchas surface active agents and phosphate esters, oily components to aidthe expression of smoothness such as liquid paraffin, and besidesemulsifiers to improve the stabilization and application properties of amoisturizer, preservatives, defoamers and the like. These auxiliaryagents can be contained as an active ingredient (absolute dry) up to atotal of less than 16.3 mass %.

Moisturizing chemicals are applied to tissue base paper by externaladdition using known chemicals applying equipment e.g. roll transferdevices such as a flexographic press and a gravure printing machine, anda spray applicator. Moisturizing chemicals can be applied to tissue basepaper from a direction, but it is desirable to apply moisturizingchemicals to both sides because smoothness on both sides is easily madeeven. In addition, the amount of moisturizing chemicals applied to thetissue base paper is suitably adjusted considering vaporization ofwater, a solvent, in the production process and the elongation of tissuebase paper generated in the production process. With respect toelongation, because the tissue base paper is crepe paper having crepe,when after applying moisturizing chemicals, the winding step and foldingstep are carried out after the application of the moisturizingchemicals, tissue base paper is elongated, and there is a tendency thatthe amount applied is slightly reduced. Therefore, it is desirable thatthe amount of active ingredient applied be adjusted to be slightly morethan a desired application amount considering elongation in suchproduction steps.

The tissue paper according to the embodiment described above andfurthermore the effects thereof particularly will be described in“Examples.”

Examples

Test samples of the tissue paper according to the present invention andtissue paper different from the tissue paper of the present inventionwere made and investigated by a sensory test described below about theevaluation items of “soft texture,” “smooth texture,” “moist texture”and “sticky texture.” In addition, the physical property values andcomposition values of each sample were measured as follows. The physicalproperty values and composition values and test results of each sampleare as shown in Tables 1 and 2 below.

[Basis Weight]

The basis weight was measured in accordance with JIS P 8124 (1998). Thevalues in tables are the average value of each ply.

[Paper Thickness]

The paper thickness was measured in accordance with the method formeasuring thickness described above under the condition of JIS P 8111(1998) using a dial thickness gauge (thickness meter) “PEACOCK G”(manufactured by OZAKI MFG. CO., LTD.)

[Density]

The density is a value obtained by dividing a value (C) obtained bydoubling the basis weight of tissue paper conditioned under thecondition of JIS P 8111 (1998) by the paper thickness of tissue paper (2ply) (D) described above, and was represented using a unit g/cm³ and thethird decimal place.

[Dry Tensile Strength]

The dry tensile strength was measured in accordance with the tensiletest of JIS P 8113 (1998).

[Wet Tensile Strength]

The wet tensile strength was measured in accordance with the tensiletest of JIS P 8135 (1998).

[Elongation Rate]

The elongation rate was measured in accordance with the tensile test ofJIS P 8113 (1998) using a “universal tensile and compression testingmachine TG-200N” manufactured by Minebea Co., Ltd.

[Softness]

Softness was measured in accordance with Handle-O-Meter method accordingto JIS L 1096 E method. It should be noted that the size of test piecewas 100 mm×100 mm and clearance was 5 mm. The longitudinal direction andlateral direction of 1 ply were measured 5 times each and the averagevalue of 10 times in total was represented using a unit of cN/100 mm.

[MMD]

This MMD is the mean deviation of coefficient of static friction and oneof the indices of smoothness. A smaller value indicates highersmoothness, and a larger value indicates poorer smoothness. As a methodfor measuring MMD, while the contact surface of a friction block isbrought into contact with the surface of a measurement sample to which20 g/cm tension is applied in a predetermined direction at a contactpressure of 25 g, the friction block is moved by 2 cm at a speed of 0.1cm/s in a direction almost the same as the direction in which tension isapplied, and a friction coefficient at this time is measured using afriction tester KES-SE (manufactured by KATO TECH CO., LTD.) A valueobtained by dividing the friction coefficient by a friction distance(travel distance=2 cm) is MMD. It should be noted that a friction blockis constituted by put 20 piano wires P with a diameter of 0.5 mm side byside, and has a contact surface formed thereon so that both length andwidth are 10 mm. The end of the contact surface is formed with unitbulge portions of 20 piano wires P (the radius of curvature 0.25 mm).

[Product Water Content Rate]

A sample was conditioned under the condition of JIS P 8111 (1998) andthe water content rate was then measured in accordance with JIS P 8127(1998).

[Content Rate of Chemical Agent and Content of Chemical Agent]

The content rate of chemical agent and the content of chemical agent canbe calculated from the measurement and calculation of a sample in thefollowing (1) to (4), and the values in tables are values based on themeasurement of samples. It should be noted that the content rate ofchemical agent and the content of chemical agent can be calculated basedon the composition of moisturizing chemicals and the physical propertiesof base paper.

(1) Measurement of Basis Weight of Sample

Tissue paper is conditioned under an environment of 23° C. and 50% R.H.prescribed in JIS P 8111 (1998). The length dimension and the widthdimension of 5 pairs of tissue paper are measured to calculate tissuepaper area (which is an area viewed from a view point on a lineperpendicular to the flat surface of a plied sheet, and is not the totalarea of plied sheets and both sides thereof). Next a sample is put intoa weighing bottle and dried under the drying condition at a temperatureof 80° C. for 120 minutes. The weighing bottle is capped and heat isreleased in a desiccator, and the absolute dry mass of a pair of tissuepaper (2 sheets) is found. From the absolute dry mass and the areameasured above, the absolute dry basis weight (per sheet) of 5 pairseach is calculated, and the average value is used as the absolute drybasis weight (g/m²) of a sample.

(2) Chemical Agent Attached Rate

Into a cylindrical weighing bottle, about 10 g of sample is put andabsolutely dried by drying at 80° C. for 120 minutes. After that, theweighing bottle is capped and heat is released in a desiccator, and theabsolute dry mass of a sample is found. A cylindrical filter paperfilled with the sample is put into a Soxhlet extractor, and 120 to 140mL of acetone:ethyl alcohol mixed solvent (mixed volume ratio 1:1) isput into a flat bottom flask, which is heated for 4 hours to an extentthat a light boiling of the extracted liquid is maintained on a hotwater bath. After heating, the extracted liquid is collected into theflask. A bent distillation tube and a condenser are set to the flask,which is heated on a hot water bath to remove the solvent. Furthermore,the flask is left to stand in a constant temperature dryer at atemperature of 105±2° C. for 90 minutes to completely remove thesolvent. The mass of extract (B) (g) is found by subtracting a constantweight of the mass of the flask from the mass of flask after removingthe solvent. Next, chemical agent attached rate is found by thefollowing formula.

Chemical agent Attached Rate=[(Mass of Extract)/{(Absolute Dry Mass ofSample)−(Mass of Extract)}]×100

It should be noted that the amount and the mass ratio of glycerin and1,3-propanediol contained in an extract can be measured by e.g. gaschromatography and mass spectroscopy (GC-MS) and high performance liquidchromatography (HPLC).

(3) Calculation of Content of Chemical Agent

The content of chemical agent is calculated by the following formula.

Content of Chemical agent (g/m²)=(Absolute Dry Basis Weight calculatedin (1) above)×(Number of Plies)×(Chemical agent Attached Rate calculatedin (2) above)/[100+(Chemical agent Attached Rate calculated in (2)above)]

(4) [Content Rate of Chemical Agent Contained (Absolute Dry)]

The content rate of chemical agent (absolute dry) is calculated from themass of tissue paper conditioned under the condition of JIS P 8111 (A)(g) and the mass of an extract found in (2) above (B) (g) by thefollowing formula. Content rate of Chemical agent Contained (mass%)=(B)/(A)×100 (mass %)

It should be noted that the content rate of chemical agent can be alsocalculated from the mass of tissue paper (A) (g) and the ratio of solidmatter obtained by removing water in chemicals.

[Sensory Test]

Sensory properties of “soft texture,” “smooth texture,” “moist texture”and “sticky texture” of each sample were evaluated by 30 evaluatorsusing “5” for one with a feeling of “very excellent” compared to areference sample, “4” for one with a feeling of “excellent,” “3” for onewith a feeling of “equal to the reference,” “2” for one with a feelingof “poor,” and “1” for one with a feeling of “sufficiently poor.” Thecalculated average point of the evaluators was used as an evaluationvalue. It should be noted that “comprehensive evaluation” was made using“5” for one with a feeling of “a good texture to the skin and very highpurchase intension,” “4” for one with a feeling of “a good texture tothe skin and high purchase intension,” “3” for one with a feeling of “anormal texture to the skin and neither high nor low purchase intension,”“2” for one with a feeling of “a poor texture to the skin and lowpurchase intension,” and “1” for one with a feeling of “a very poortexture to the skin and almost no purchase intension.” The calculatedaverage point of the evaluators was used as an evaluation value.

[Test Results] [Table 1]

Table 1 shows the test results of each sample in which the amount of1,3-propanediol blended in chemical agent and, in relation to this, theproportion with glycerin were changed under the condition that thepapermaking condition of base paper and the amount of chemicals appliedand the like are fixed. The reference sample of sensory evaluation isone in which 1,3-propanediol is not contained and glycerin is a maincomponent (Comparative Example 1). In addition, the graph of the sensoryevaluation results is shown in FIG. 1.

As shown in Table 1 and FIG. 1, when the mass ratio of glycerin and1,3-propanediol is in the range of the present invention, remarkablyexcellent results were obtained in the evaluation items of “softtexture,” “smooth texture,” “thick texture,” “moist texture,” “stickytexture” and “comprehensive evaluation” compared to those of thereference sample. Very remarkably high evaluation was obtainedparticularly in “smooth texture,” “moist texture” and “sticky texture.”From the above, it is found that when the mass ratio of glycerin and1,3-propanediol is in the range of the present invention, tissue paperwhich is “smooth and moist” and in which “stickiness” is not easily feltcan be obtained. The evaluation of “soft texture” was also high.

Furthermore, it can be verified that from this Table 1, even when thecontent of chemical agent is in the range of the present invention, theevaluation is not good when the mass ratio of glycerin and1,3-propanediol is not in the range of the present invention.

[Table 2]

Table 2 mainly shows the test results of each sample in which thecontent of chemical agent was changed. The reference sample of sensoryevaluation is a general-purpose one to which chemical agent is notapplied (Comparative Example 8). In addition, the graph of the sensoryevaluation results of Example 8 to Example 15 and Comparative Example 8to Comparative Example 11 is shown in FIG. 2. As shown in Table 2 andFIG. 2, when the content of chemical agent is in the range of thepresent invention, remarkably excellent results were obtained in theevaluation items of “soft texture,” “smooth texture,” “moist texture”and “sticky texture” compared to those of the reference sample. Veryremarkably high evaluation was obtained particularly in “smoothtexture,” “moist texture” and “sticky texture.” From the above, it isfound that when the content of chemical agent is in the range of thepresent invention, tissue paper which is “smooth and moist” and in which“stickiness” is not easily felt can be obtained. The evaluation of “softtexture” was also high. From Table 2, it can be further verified thatwhen the content of chemical agent is lower or higher than the range ofthe present invention, the evaluation is not good even when the massratio of glycerin and 1,3-propanediol is in the range of the presentinvention.

Furthermore, when focusing on Comparative Example 12, remarkable resultswere not verified in a case where the total mass % of glycerin and1,3-propanediol and the mass ratio of glycerin and 1,3-propanediol isnot in the range of the present invention even when the total proportionof glycerin and 1,3-propanediol in chemical agent is in the range of thepresent invention.

CONCLUSION

From the above results of each test, tissue paper in which particularlyboth a “moist texture” and “smooth texture” are improved, a “moisttexture” is retained and simultaneously “smooth texture” can besufficiently felt can be obtained by adjusting the combined proportionof glycerin and 1,3-propanediol in chemical agent, the blending ratio ofglycerin and 1,3-propanediol and the content of chemical agent to therange of the present invention. Furthermore, a “sticky texture” islimited and “soft texture” is also high. As described above, accordingto the present invention, the quality characteristics of tissue paper,“soft texture,” “smooth texture,” “moist texture” and “sticky texture”are excellent.

TABLE 1 Com- Com- Com- Com- Com- Com- par- par- par- par- par- par-ative ative ative ative ative ative Ex- Ex Ex Ex- Ex Ex- Exam- Exam-Exam- Exam- Exam- Exam- Exam- am- am- am- am- am- am- ple 1 ple 2 ple3ple 4 ple 5 ple 6 ple 7 ple 1 ple 2 ple 8 ple 4 ple 5 ple 6 Base BleadedNBKP: 50:50 50:50 50:50 50:50 50:50 50:50 50:50 50:50 50:50 50:50 50:5050:50 50:50 paper pulp LBKP ma- ratio king Crepe % 14.0 14.0 14.0 14.014.0 14.0 14.0 14.0  14.0  14.0  14.0  14.0  14.0 rate Soften- mass 0.60.6 0.6 0.6 0.6 0.6 0.6 0.6  0.6  0.6  0.6  0.6  0.6 ing % agent   Drymass 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0  0.0  0.0  0.0  0.0  0.0 paper %strength- ening agent Wet mass 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2  1.2  1.2 1.2  1.2  1.2 paper % strength- ening agent Che- Chem- Yes or Yes YesYes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes mi- icals No cals appli-appli- cation ca- Appli- Gra- Gra- Gra- Gra- Gra- Gra- Gra- Gra- Gra-Gra- Gra- Gra- Gra- tion cations vure vure vure vure vure vure vure vurevure vure vure vure vure method trans- trans- trans- trans- trans-trans- trans- trans- trans- trans- trans- trans- trans- fer fer fer ferfer fer fer fer fer fer fer fer fer Mois- Mois- mass 81.0 69.0 55.0 49.042.5 22.0 13.0 85.0  75.5  82.0  4.9  2.0  1.5 tur- turizing % izer com-com- ponent po- glycerin nent 1,3- mass 4.0 8.0 20.0 36.0 42.5 58.0 72.00.0  1.5  3.0  80.0  88.0  83.5 pro- %   panediol   Sorbitol mass 0.08.0 10.0 0.0 0.0 5.0 0.0 0.0  8.0  0.0  0.0  0.0  0.0 %     Soften- mass1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3  1.3  1.3  1.3   1.3  1.3 ing % agent  Phos-   phate ester   Oily mass 2.3 2.3 2.3 2.3 2.3 2.3 2.3 2.3  2.3 2.3  2.3  2.3  2.3 com- %   ponent Liquid   paraffin   Hydro- mass 0.50.5 0.5 0.5 0.5 0.5 0.5 0.5  0.5  0.5  0.5  0.5  0.5 philic % polymergelling agent (gluco- mannan) Emul- mass 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3  0.3  0.3  0.3  0.3 sifier %       Preser- mass 0.1 0.1 0.1 0.1 0.10.1 0.1 0.1  0.1  0.1  0.1  0.1  0.1 vative %     De- mass 0.05 0.050.05 0.05 0.05 0.05 0.05 0.05  0.05  0.05  0.05  0.05  0.05 foamer %Water mass 10.5 10.5 10.5 10.5 10.5 10.5 10.5 10.5  10.5  10.5  10.5 10.5  10.5 (water % content in chem- ical liquid) Total mass 100.0100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0% Glycerin mass 94.9 86.0 83.7 94.9 94.9 89.3 94.9 94.9  96.0  94.9 94.9  95.0  94.9 + % 1,3pro- panediol (in chem- ical) Mass (Gly- 1:0.051:0.12 1:0.36 1:0.74 1:1 1:2.64 1:5.56 1:0 1:0.02 1:0.04 1: 1:41.5 1:ratio cerin): 16.33 57.59 (1, 3Pro- pane- diol) Con- Content g/m2 6.86.7 6.9 6.7 6.6 6.3 6.9 6.8  7.0  6.9  6.9  6.8  6.8 tent rate of ofchem- che- ical mical agent agent Content mass 25.0 25.0 25.0 25.0 25.025.0 25.0 25.0  25.0  25.0  25.0  25.0  25.0 and of % the chem- likeical agent (in- cluding water) Content mass 22.4 22.4 22.4 22.4 22.422.4 22.4 22.4  22.4 22.4 22.4  22.4  22.4 rate of % chem- ical agent(Ab- solute dry) Ratio of mass 1.0 2.0 5.0 9.0 10.6 14.5 18.0 0.0  0.4 0.8  20.0  20.8  20.9 1,3- % pro- panediol in paper Pro- Base g/m2 17.016.8 17.3 16.8 16.6 17.0 17.2 16.9  17.5  17.3  17.2  17.1  17.0 ductweight qual- (1P) ity Paper mm 144 143 142 142 140 139 136 150 145 146136 150 150 thick- ness (2P) Density g/cm3 0.24 0.23 0.24 0.24 0.24 0.240.25 0.23  0.24  0.24  0.25  0.23  0.23 (2P) Dry cN/25 176 165 160 151150 149 148 196 190 138 148 145 146 tensile mm strength (MD) 2P DrycN/25 62 61 58 55 53 51 53 67  66  65  53  52  50 tensile mm strength        (MD)         2P Wet cN/25 90 84 82 77 77 76 75 99  99  99  75  99 99 tensile mm strength         (MD)         2P Wet cN/25 42 43 41 50 4240 39 45  43  41  39  40  42 tensile mm strength (MD) 2P Wet cN/25 0.680.70 0.71 0.91 0.79 0.78 0.74 0.67  0.65  0.68  0.74  0.77  0.84 tensilemm strength (CD) 2P/Dry tensile strength (CD) 2P Elon- % 11.6 11.2 11.111.0 11.3 10.5 10.8 12.0  12.2  11.8  10.8  10.4  10.3 gation rate (MD)Softness cN/ 0.82 0.78 0.76 0.70 0.72 0.70 0.68 0.88  0.85  0.86  0.68 0.88  0.88 100 mm MMD 1/100 6.4 6.8 6.4 6.5 6.8 6.2 6.3 6.7  6.8  6.6 6.3  6.2  6.3 (face) Product mass 11.8 12.4 13.6 14.2 16.0 15.4 15.69.8  10.2  10.4  15.8  16.3  16.3 water % content rate Sen- Soft 3.3 3.53.6 3.6 3.6 3.5 3.4 3.0  3.0   3.1   3.2  3.0  2.9 sory texture            eval- Smooth 3.5 3.7 4.2 4.3 4.4 4.2 3.9 3.0  3.0   3.1   3.5  3.2 3.0 ua- texture             tion Moist 3.5 3.6 4.0 4.0 4.0 3.9 3.7 3.0 3.0   3.1   3.5  8.0  3.1 texture             Sticky 3.5 3.6 4.0 4.14.2 4.1 3.9 3.0  3.0   3.1   3.5  3.1  3.0 texture             Com- 3.53.6 4.0 3.9 4.0 4.0 3.8 3.0  3.0   3.1   3.4  3.1  3.0 pre- hensiveeval- uation Com- par- ative Exam- ple 7

Base Bleaded NBKP: 50:50 50:50 50:50 50:50 50:50 50:50 50:50 50:50 50:5050:50 50:50 50:50 paper pulp LBKP ma- ratio king Crepe % 14.0 14.0 14.014.0 14.0 14.0 14.0 14.0 14.0  14.0  14.0  14.0 rate Soften- mass 0.60.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6  0.6  0.6  0.6 ing % agent     Dry mass0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0  0.0  0.0  0.0 paper % strength-    ening     agent     Wet mass 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2  1.2 1.2  1.2 paper % strength- ening agent Che- Chem- Yes or Yes Yes YesYes Yes Yes Yes Yes Yes — Yes Yes mi- icals No cals appli- appli- cationca- Appli- Gra- Gra- Gra- Gra- Gra- Gra- Gra- Gra- Gra- — Gra- Gra- tioncations vure vure vure vure vure vure vure vure vure vure vure methodtrans- trans- trans- trans- trans- trans- trans- trans- trans- trans-trans- fer fer fer fer fer fer fer fer fer fer fer Mois- Mois- mass 0.042.5 42.5 48.9 34.4 42.5 24.9 12.9 18.4 —  72.9  74.9 tur- turizing %izer com- com- ponent po- glycerin nent 1,3- mass 85.0 42.5 42.5 36.042.5 42.5 60.0 72.0 66.5 —  12.0  10.0 pro- % panediol Sorbitol mass 0.00.0 0.0 0.0 8.0 0.0 0.0 0.0 0.0 —  0.0  0.0 %     Soften- mass 1.3 1.31.3 1.3 1.3 1.3 1.3 1.3 1.3 —  1.3  1.3 ing % agent     Phos-     phateester     Oily mass 2.3 2.3 2.3 2.3 2.3 2.3 2.3 2.3 2.3 —  2.3  2.3 com-%     ponent Liquid     paraffin     Hydro- mass 0.5 0.5 0.5 0.5 0.5 0.50.5 0.5 0.5 —  0.5  0.5 philic %     polymer     gelling     agent    (gluco-     mannan)     Emul- mass 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 — 0.3  0.3 sifier %     Preser- mass 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1—  0.1  0.1 vative %     De- mass 0.05 0.05 0.05 0.05 0.05 0.05 0.050.05 0.05 —  0.05  0.05 foamer % Water mass 10.5 10.5 10.5 10.5 10.510.5 10.5 10.5 10.5 —  10.5  10.5 (water % content in chem- ical liquid)Total mass 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 — 100.0100.0 % Glycerin mass 94.9 94.9 94.9 94.9 85.9 94.9 94.9 94.9 94.9 — 94.9  94.9 + % 1,3pro- panediol (in chem- ical) Mass (Gly- 0:01 1:1 1:11:0.74 1:1.124 1:1 1:2.41 1:5.58 1:3.61 — 1:0.16 1:0  ratio cerin):

(1, 3Pro- pane- diol) Con- Content g/m2 7.0 2.9 4.3 5.5 5.6 6.9 6.8 6.88.0 —  1.6  2.5 tent rate of of chem- che- ical mi- agent cal Contentmass 25.0 10.0 15.0 20.0 20.0 25.0 25.0 25.0 30.0 —  5.0  8.0 agent of %and chem- the ical like agent (in- cluding water) Content mass 22.4 9.013.4 17.9 17.9 22.4 22.4 22.4 26.9 —  4.5  7.2 rate of % chem- icalagent (Ab- solute dry) Ratio of mass 21.3 4.3 6.4 7.2 8.5 10.6 15.0 18.020.0 —  0.6  0.8 1,3- % pro- panediol in paper Pro- Base g/m2 17.4 16.216.3 16.6 16.9 17.2 17.0 17.1 17.4  15.2  17.2  17.2 duct weight qual-(1P) ity Paper mm 150 152 156 155 150 152 150 150 150 153 145 145 thick-ness (2P) Density g/cm3 0.23 0.21 0.21 0.21 0.23 0.23 0.23 0.23 0.23 0.20  0.24  0.24 (2P) Dry cN/25 149 210 226 230 200 210 200 200 200 196196 196 tensile mm strength (MD) 2P Dry cN/25 50 53 53 53 53 53 53 53 53 67  67  67 tensile mm strength       (MD)       2P Wet cN/25 99 122 122122 98 99 100 82 82  99  99  99 tensile mm strength       (MD)       2PWet cN/25 40 58 56 58 56 55 56 51 51  45  45  45 tensile mm strength(MD) 2P Wet cN/25 0.80 1.09 1.06 1.09 1.06 1.04 1.06 0.96 0.96  0.67 0.67  0.67 tensile mm strength (CD) 2P/Dry tensile strength (CD) 2PElon- % 10.0 9.5 10.2 10.4 9.0 9.5 9.0 9.5 9.5  9.9  9.9  9.9 gationrate   (MD) Softness cN/ 0.88 0.78 0.80 0.82 0.72 0.78 0.72 0.72 0.72 0.85  0.85  0.85 100   mm   MMD 1/100 6.1 6.4 6.7 6.5 6.5 6.4 6.5 6.56.5  6.6  6.6  6.6 (face) Product mass 16.8 11.3 12.2 13.4 14.5 15.015.0 14.8 15.9  16.5  16.5  16.5 water % content rate Sen- Soft 2.8 3.33.5 3.8 4.0 4.2 4.2 4.2 3.8  3.0  3.1  3.2 sory texture       eval-Smooth 3.1 3.5 3.7 3.9 4.0 4.2 4.3 4.2 3.9  3.0  3.1  3.2 ua- texture      tion Moist 3.0 3.5 3.6 3.7 3.8 4.0 4.0 3.9 3.8  3.0  3.0  3.1texture       Sticky 3.0 3.5 3.4 3.5 3.7 3.8 4.0 4.2 3.8  3.0  3.1  3.2texture       Com- 3.0 3.5 3.6 3.7 3.8 4.1 4.2 3.9 3.5  3.0  3.0  3.2pre- hensive   eval- uation

indicates data missing or illegible when filed

1. 2-ply tissue paper, wherein a basis weight per ply is 15 to 18 g/m²,the 2-ply paper thickness is 135 to 160 μm, and the 2-ply tissue papercontaining 2.9 g/m² or more and 8.0 g/m² or less of chemical agent whichcontains glycerin and 1,3-propanediol in a total amount of 83.7 mass %or more, wherein the blending ratio of glycerin and 1,3-propanediol (theblending ratio of 1,3-propanediol to 1 glycerin) is above 1:0.04 and1:5.58 or less.
 2. The 2-ply tissue paper, wherein a basis weight perply is 16.2 g/m² or more and 17.4 g/m² or less, the 2-ply paperthickness is 136 μm or more and 156 μm or less, and the 2-ply tissuepaper containing 2.9 g/m² or more and 8.0 g/m² or less of chemical agentwhich contains glycerin and 1,3-propanediol in a total amount of 83.7mass % or more, wherein the blending ratio of glycerin and1,3-propanediol (the blending ratio of 1,3-propanediol to 1 glycerin) isabove 1:0.04 and 1:5.58 or less.
 3. The 2-ply tissue paper according toclaim 1, wherein the 2-ply dry tensile strength in the CD direction is51 cN/25 mm or more and 62 cN/25 mm or less, the 2-ply wet tensilestrength in the CD direction is 39 cN/25 mm or more and 58 cN/25 mm orless, and the ratio of the 2-ply wet tensile strength in the CDdirection to the 2-ply dry tensile strength in the CD direction is 0.68or more.